samira-t/akka — comment on commit 1fc202eb1efa9deb6c39741966c52e2309e5def9
File: akka-setack/src/main/scala/akka/setack/core/dispatcher/TestDispatcher.scala line 21
By viktorklang:

TBH it won't work with a specific test dispatcher since people will create new dispatchers for child-actors and specify them internally, I think you'll need to settle for just Provider implementation and then intercept on message send, and perhaps use bytecode weaving to intercept the mailboxes.